function Request(url, param, target, method) {
    var temp_form = document.createElement("form");
    temp_form.action = url;
    temp_form.target = target;
    temp_form.method = method;
    temp_form.style.display = "none";
    if (param != null && param != "") {
        for (var x in param) {
            var opt = document.createElement("input");
            opt.name = x;
            opt.value = param[x];
            temp_form.appendChild(opt);
        }
    }
    //把表单输出到Body, 不然FireFox不能提交
    document.body.appendChild(temp_form);
    temp_form.submit();
}
